Facebook Like Gate like_status is empty

本文关键字：status is empty like Like Gate Facebook | 更新日期: 2023-09-27

所以基本上我试图让一个喜欢的门工作，但 $like_status 变量永远不会改变，所以我更改为喜欢内容的条件永远不会起作用。有谁知道为什么这永远不会改变？已将我的应用程序添加到Facebook上的页面选项卡中，它获取所有其他变量$page_id，$page_admin，$country和$locale，但不是$like_status。

谢谢查理

请参阅下面的代码

<?php
    enter code here
require_once('AppInfo.php');
// Enforce https on production
if (substr(AppInfo::getUrl(), 0, 8) != 'https://' && $_SERVER['REMOTE_ADDR'] != '127.0.0.1') {
  header('Location: https://'. $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
  exit();
}
// This provides access to helper functions defined in 'utils.php'
require_once('utils.php');

require 'includes/facebook.php';

// Create our Application instance.
$facebook = new Facebook(array(
  'appId'  => AppInfo::appID(),
  'secret' => AppInfo::appSecret(),
  'cookie' => true
));
$signed_request = $facebook->getSignedRequest();
$page_id = $signed_request["page"]["id"];
$page_admin = $signed_request["page"]["admin"];
$like_status = $signed_request["page"]["liked"];
$country = $signed_request["user"]["country"];
$locale = $signed_request["user"]["locale"];
echo "<br>page id = $page_id";
echo "<br>page admin = $page_admin";
echo "<br>like status = $like_status";
echo "<br>country = $country";
echo "<br>locale = $locale";
function grokSignedRequest() 
{
    if (isset($_REQUEST['signed_request'])) 
    {
      $encoded_sig = null;
      $payload = null;
      list($encoded_sig, $payload) = explode('.', $_REQUEST['signed_request'], 2);
      $sig = base64_decode(strtr($encoded_sig, '-_', '+/'));
      $data = json_decode(base64_decode(strtr($payload, '-_', '+/'), true));
      return $data;
    }
    return false;
}

// call the function to parse the signed request
$sr_data = grokSignedRequest();

// check like status
if ($sr_data->page->liked==1) 
{
    include ('includes/index2.php');
} 
else
{
  include ('includes/index1.php');
}
?>

如果您在标签页上运行 PHP 代码，则 like_status 可能实际存在，但设置为值 0（零）。因此，echo语句似乎没有为$like_status输出任何内容，但实际上，它的值为零。要证明这一点，请尝试这样的代码：

if ($like_status == 0)
    echo "it's zero";
else 
    echo "it's not zero";

编辑：抱歉，我没有看到@robbie问题的评论中解决了这个问题

用户必须从页面选项卡到达应用，并且：

与画布页面一样，在用户授权您的应用之前，您不会收到signed_request中您的应用可访问的所有用户信息。

https://developers.facebook.com/docs/appsonfacebook/pagetabs/#integrating